ava6973 ava6973 27-09-2022 Chemistry contestada Neon has three different isotopes. 90.51% of neon atoms have a mass of 19.992 amu 0.27% of neon atoms have a mass of 20.994 amu. 9.22% of neon atoms have a mass of 21.991 amu. What is the average atomic mass of neon?